Compilare: main.cpp:26:14: warning: multi-character character constant [-Wmultichar] fout<<'-1'<<'\n'; ^~~~ main.cpp: In function 'void DFS(int)': main.cpp:62:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<LA[x].size();i++) ~^~~~~~~~~~~~~ main.cpp: In function 'void DFS1(int)': main.cpp:73:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<LA[x].size();i++) ~^~~~~~~~~~~~~ main.cpp:72:8: warning: unused variable 'j' [-Wunused-variable] {int i,j; ^